Improvement in spark-arresters, heaters, and soot-gatherers



n. HAWK ESWORTH & H. COLFORD.

SPARK-ARRESTER, HEATER. AND SOOT-GATHERER. No.175,704. Patented April 4;, 1876.

- I Inventors:

N-PETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D. C

drum or smoke-box A is provided with doors,

f at the bottom, which communicate with fines or pipes that conduct the cold air from the outside. The air is heated in its passage through the drum, (or it may be heated by a furnace placed at some intermediate point between the outlet of the induct-pipes and the ventilator drum,) and escapes at the I top through a selfclosing valve, g, operated by cords or chains h, by which the supply of fresh air may be regulated.

When used as a spark-arrester this device may be placed inside of the chimney, smokestack, or flue at any suitable point; orit may be placed upon the top of the chimney or smoke-stack in the usual manner. When used as a heater or soot-gatherer the drum or box containing the plates should be placed at some convenient point (preferably in an upright position) upon the pipe or flue leading from the stove into the chimney, substantially in the manner shown in Fig. 5. Whether used as a spark-arrester, heater, or soot-gatherer, this device efl'ects a better combustion of fuel, it prevents too strong draft when the wind is high, thus serving as a draft-equalizer, and it may be readily applied to any ordinary chimney, smoke-stack, or stove at a comparatively small outlay. When used as a spark-arrester this device will be found not only to effectuall y and absolutely prevent the escape of sparks, but the spiral or rotary motion imparted to the smoke by the circumferentially-arranged plates will improve the draft, so that this invention may be applied with-advantage upon chimneys or lines that are defective in that respect. The drum or box A may be made of metal, earthenware, or any other suitable material.

Having thus described our invention, we claim and desire to secure by Letters Patent of the United States 1. In a spark-arrester, heater, or soot-gatherer, constructed substantially as hereinbefore described-that is, with a series of interior plates arranged circumferentially and spirally so as to overlap each other at the sidesthe removable plates a, substantially in the manner and for the purpose herein shown and specified.

2. The combination of a smoke-stack or drum, A, with a system of circumferentially and spirally arranged plates that increase-in size from the bottom upward, substantially in the manner and for the purpose herein shown and specified.

In testimonythat we claim the foregoing as our own we have hereto affixed our signatures in presence of two witnesses.

DANIEL HAWKESWORTH. HENRY OOLFOED.

Witnesses:

HUGH MoD. HENRY, I. J. OoLFoRD. 

